Peytoia
Extinct genus of radiodont / From Wikipedia, the free encyclopedia
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Peytoia is a genus of hurdiid radiodont, an early diverging order of stem-group arthropods, that lived in the Cambrian period, containing two species, Peytoia nathorsti from the Miaolingian of Canada and Peytoia infercambriensis from Poland, dating to Cambrian Stage 3.[1] Its two frontal appendages had long bristle-like spines, it had no fan tail, and its short stalked eyes were behind its large head.
Peytoia | |
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Fossil specimen of Peytoia nathorsti | |
Reconstruction of P. nathorsti | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | †Dinocaridida |
Order: | †Radiodonta |
Family: | †Hurdiidae |
Genus: | †Peytoia Walcott, 1911 |
Type species | |
†Peytoia nathorsti Walcott, 1911 | |
Species | |
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Synonyms | |
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108 specimens of Peytoia are known from the Greater Phyllopod bed, where they comprise 0.21% of the community.[2]
Peytoia nathorsti and its junior synonym Laggania cambria played a major role in the discovery of the radiodont body plan. Initially interpreted as a jellyfish and a sea cucumber respectively, they were eventually shown to be the mouthparts and body of a single animal, which bore Anomalocaris-like appendages.
Peytoia infercambriensis is the geologically oldest known radiodont species.[1]